Aptesis flagitator ( Rossi, 1794 )

Aptesis flagitator ( Rossi, 1794) View in CoL

[New SJN: Toge-hida-togari-himebachi]

( Figs. 10A–I, 11A–D, 77I, 78H)

Ichneumon flagitator Rossi, 1794: 108 .

Phygadeuon pumilio Gravenhorst, 1829: 653 .

Cryptus tyrannus Gravenhorst, 1829: 630 View in CoL .

Cryptus hopei Desvignes, 1856: 58 .

Phygadeuon proximator Costa, 1886: 323 .

Microcryptus tricolor Kriechbaumer, 1894a: 243 . Acanthocryptus hopei Morley, 1907: 56 .

Acanthocryptus feketei Kiss, 1915: 29 .

Acanthocryptus flagitator rufipes Obrtel, 1953: 202 .

Materials examined. JAPAN: [Honshu] KPM-NK 102990 , F, Kanagawa Pref., Yokosuka City, Nobi , 5. XI. 2012, Y. Suzuki leg. ; KPM-NK 91322 , F, Kanagawa Pref., Atsugi City, Funako, Campus of Tokyo University of Agriculture , 22. IV. – 16. V. 2016, Y. Kato & S. Koizumi leg. (MsT) ; KPM-NK 81201 , F, ditto, 6. V. – 7. VI. 2016 ; KPM-NK 102989 , F, Kanagawa Pref., Odawara City, Kuno, Suwanohara-park , 21. V. 2017, K. Watanabe leg. ; KPM-NK 102991 , M, Toyama Pref., Toyama City, Arimine, Inonedani , 11–16. VIII. 2009, M. Watanabe leg. (MsT) ; KPM-NK 103164 , M, Osaka Pref., Osaka City, Taisho-Ku, Chidori-koen , 1. IX. 2019, Y. Ueyama leg. ; KPM-NK 103165 , M, ditto, 30. X. 2019 ; KPM-NK 103166 , M, ditto, 3. XI. 2020 ; KPM-NK 103167 , M, ditto, 5. XI. 2020 ; KPM-NK 103168 , M, ditto, 3. XI. 2020 ; KPM-NK 103169–103173 , 4 F & 1M, ditto, 8. XI. 2020 ; OMNH, 1M, ditto, 12. XI. 2020 ; OMNH, 1F, ditto, 16. XI. 2020 ; OMNH, 1M, ditto, 4. XII. 2020 ; OMNH, 1M, ditto, 25. XI. 2021 ; KPM-NK 102992 , F, Hyogo Pref., Sayo Town, Nikata , 14. V. 2011, S. Fujie leg. AUSTRIA: LI, F (det. M. Schwarz), Purgstall , 28. VII. 1970, Ressel leg.

Description based on Japanese materials. Female (n = 10). Body punctate and polished; covered with setae; body length 4.7–7.1 mm.

Head 0.55–0.6 × as long as wide in dorsal view. Clypeus 2.55–2.9 × as wide as long; slightly convex in lateral view; sparsely to densely punctate dorsally, smooth ventrally; lower margin rounded in frontal view, sharp and narrowly reflected in lateral view. Face 0.33–0.38 × as long as minimum width; weakly convex medially; densely punctate; matt along eye and antennal sockets. Frons densely punctate except for smooth area above antennal sockets; punctures partly united into foveola; POL 2.0–2.3 × as OD. OOL 1.2–1.4 × as OD. Dorsal profile of gena slightly rounded in dorsal view; width gradually narrowing posteriorly ( Fig. 10E). Occipital carina complete. Malar space 1.15–1.3 × as long as basal width of mandible. Mandible flat at base; lower tooth equal in length of upper tooth. Antenna with 24–25 flagellomeres; not flattened and tapped. FL I 1.95–2.1 × as long as maximum depth in lateral view, 0.9–1.0 × as long as FL II.

Mesosoma densely punctate. Pronotum rugulose ventrally. Epomia short; dorsal end situated between collar and dorsal margin of pronotum. Mesoscutum with short and weak notaulus. Scutellum punctate; slightly convex in lateral view. Mesopleuron with conspicuous smooth area around speculum; punctures partly united into groove-like longitudinal foveola (especially area below speculum). Epicnemial carina present laterally and ventrally. Sternaulus deep in entire length of mesopleuron. Metapleuron irregularly rugose or reticulate rugose; with weak or indistinct juxtacoxal carina. Propodeum rugose or rugulose; with all carinae ( Fig. 10I); area superomedia defined, as long as maximum width; apophysis pointed and strong ( Figs. 10B, C, I, 77I); spiracle round to oval. Fore wing length 4.1–5.5 mm. Areolet as long as maximum width; width gradually narrowing anteriorly; received vein 2m-cu slightly beyond to middle ( Fig. 10H). Fore wing vein 1cu-a interstitial to vein M&RS ( Fig. 10H). Nervellus slightly inclivous; intercepted near posterior end of vein. Hind femur densely punctate; 4.6–5.0 × as long as maximum depth in lateral view. Tarsal claws simple.

Metasoma. T I 1.75–1.9 × as long as maximum width; smooth; latero-median carina present except for apical part; dorso-lateral carina complete ( Fig. 77I). T II 0.5–0.55 × as long as maximum width. Thyridium present; close to anterior margin of T II; flat to slightly depressed; ca. 3.0 × as wide as length. T II to T V finely and sparsely punctate. Ovipositor sheath 0.7–0.75 × as long as hind tibia, 1.15– 1.25 × as long as T I. Ovipositor straight; apex sharp; apex of lower valve with teeth ( Fig. 78H).

Colouration ( Figs. 10A–I). Body (excluding wings) black to blackish-brown. Setae gold to pale yellow. Mandible more or less tinged with reddish-brown except for teeth. Clypeus, facial orbit, and frontal orbit sometimes tinged with reddish-brown. FL IV (or V, VI) to FL IX (or X) with white markings. Basal part of flagellum partly yellowish-brown to reddish-brown. Mesosoma sometimes with several red to reddish-brown area(s) on collar, mesoscutum, mesopleuron, mesosternum, metapleuron, and propodeum ( Figs. 10B, F). Tegula yellowish-brown. Scutellum with reddish-brown marking. Legs reddish-brown except for apices of hind femur and tibia and hind tarsus. T I and T II reddish-brown to reddish-yellow. T III sometimes partly reddish-brown to reddish-yellow. Posterior margins of T VI to T VIII narrowly whitish medially. Ovipositor reddish-brown. Wings yellowish-hyaline. Veins and pterostigma blackish-brown except for yellowish-brown to yellow wing base.

Male (n =10). Similar to female ( Figs. 11A–D). Body length 5.6–7.5 mm. Face 0.4 × as long as minimum width. POL 1.9–2.0 × as OD. OOL 1.1–1.4 × as OD. Malar space 0.8–1.0 × as long as basal width of mandible. Flagellum with tyloids on FL X (or XI) to FL XV (XVI, or XVII) ( Fig. 11D). FL I 2.0–2.1 × as long as maximum depth in lateral view. T II 0.85–0.9 × as long as maximum width. Antenna entirely black except for ventral ivory spot of scape. Face with pair of ivory markings along each orbit. Clypeus partly tinged with yellow to ivory. Palpi ivory. Mesosoma black except for ivory areas on tegula, scutellum, and postscutellum. T I to T III with red to reddish-brown to reddish-yellow. Coxae black; fore coxa sometimes with small yellow marking. Trochanters yellow with black area. Trochantellus yellow. Fore and mid femora, tibiae, and tarsi reddish-yellow. Hind femur and tibia reddish-yellow except for darkened apices. Hind tarsus blackish-brown.

Distribution. Japan (Hokkaido and Honshu).

Bionomics. Host: Agonopterix heracliana (Linnaeus, 1758) ( Lepidoptera , Depressariidae ) (e.g. Boie, 1855); Athalia spinarum (Fabricius, 1793) (= At. rosae (Linnaeus, 1758)) ( Riggert, 1939) . The former host is doubtful because the host of this genus is mainly sawfly. Although no host record is recorded in Japan, Aptesis fragitator and Athalia rosae are at least sympatrically found in Atsugi, Odawara, and Osaka cities of above localities. Thus, this host is potentially the host of A. fragitator in Japan.

Remarks. Uchida (1930) recorded this species from Sapporo, Hokkaido, as Acanthocryptus hopei , while this datum is not mentioned by Townes et al. (1965) and Konishi & Matsumoto (2020). The record in this study is the first record of this species from Honshu.